/*
 * This is Melet, a salary slip designer. Feed it with data regarding to salary payment, prepare it for print through the graphical presentation, and you have it done.
 * Copyright (C) 2014, AFDiaX
 * 
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * This program is based on UMLet, a Free UML Tool for Fast UML Diagrams.
 * To contact the authors of UMLet visit https://code.google.com/p/umlet/people/list
 * To contact the authors of Melet visit https://gna.org/users/gabocze
 */
package com.baselet.control.util;

import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;

public class RecentlyUsedFilesList implements Iterable<String> {

	private static RecentlyUsedFilesList instance = new RecentlyUsedFilesList();

	public static RecentlyUsedFilesList getInstance() {
		return instance;
	}

	private static final int LIST_LENGTH = 10;

	private final List<String> recentFiles = new ArrayList<String>();

	public void add(String filename) {
		if (recentFiles.contains(filename)) {
			recentFiles.remove(filename);
		}
		recentFiles.add(0, filename);
		if (recentFiles.size() > RecentlyUsedFilesList.LIST_LENGTH) {
			recentFiles.remove(RecentlyUsedFilesList.LIST_LENGTH);
		}
	}

	public List<String> getList() {
		return recentFiles;
	}

	@Override
	public Iterator<String> iterator() {
		return recentFiles.iterator();
	}

	public void addAll(List<String> items) {
		recentFiles.addAll(items);
	}

	public boolean isEmpty() {
		return recentFiles.isEmpty();
	}
}
